fix: support service runtime fallbacks

electron/services/videoService.ts

@@ -1,9 +1,9 @@
 import { join } from 'path'
 import { existsSync, readdirSync, statSync, readFileSync, appendFileSync, mkdirSync } from 'fs'
 import { pathToFileURL } from 'url'
-import { app } from 'electron'
 import { ConfigService } from './config'
 import { wcdbService } from './wcdbService'
+import { getPathFallback } from './electronRuntime'
 
 export interface VideoInfo {
   videoUrl?: string       // 视频文件路径（用于 readFile）
@@ -45,7 +45,7 @@ class VideoService {
     try {
       const timestamp = new Date().toISOString()
       const metaStr = meta ? ` ${JSON.stringify(meta)}` : ''
-      const logDir = join(app.getPath('userData'), 'logs')
+      const logDir = join(getPathFallback('userData'), 'logs')
       if (!existsSync(logDir)) mkdirSync(logDir, { recursive: true })
       appendFileSync(join(logDir, 'wcdb.log'), `[${timestamp}] [VideoService] ${message}${metaStr}\n`, 'utf8')
     } catch { }